Most voted questions in Blockchain

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Not able to attach geth.ipc: Fatal: Unable to attach to remote geth: connect: connection refused

You should not mention double quotes for ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,180 points • 3,289 views
0 votes
1 answer

Can not open geth console: Fatal: Error starting protocol stack: listen tcp :30303: bind: address already in use

The default port for geth is 30303. ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,180 points • 5,995 views
0 votes
1 answer

Private ethereum network can not find geth.ipc

you will need to start your blockchain ...READ MORE

Oct 3, 2021 in Blockchain by Sudler
edited Mar 5 • 3,063 views
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1 answer

How to reintialize genesis block in geth ethereum?

You are getting this error because you ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,180 points • 6,880 views
0 votes
1 answer

geth: Fatal: invalid genesis file: invalid character 'â' looking for beginning of object key string

Looks like your editor is adding characters ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,180 points • 7,798 views
0 votes
1 answer

geth: Fatal: Error starting protocol stack: datadir already used by another process

It seems like geth is already running. ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,180 points • 6,457 views
0 votes
1 answer

Why do I require fabric-kafka and fabric-order containers in same network?

There are three ordering services, as you ...READ MORE

Dec 6, 2018 in Blockchain by Perry
 • 17,100 points • 1,554 views
0 votes
1 answer

How to use different network cards for multiple composer rest server users?

You are getting the same network card in ...READ MORE

Dec 6, 2018 in Blockchain by Perry
 • 17,100 points • 1,552 views
0 votes
1 answer

truffle compile shows error: TypeError: Invalid type for argument in function call.

You are getting this error because you ...READ MORE

Dec 5, 2018 in Blockchain by Omkar
 • 69,180 points • 2,671 views
0 votes
1 answer

Truffle compile shows DeclarationError: Undeclared identifier.

Hey. You might have missed declaring the "myaddress"  ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,180 points • 2,901 views
0 votes
1 answer

Should I encrypt my address before sending bitcoin?

Hey. No, you dont have to encrypt ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,180 points • 797 views
0 votes
1 answer

What is the difference between hashing and encryption process?

Hashing and encryption are same but not ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,180 points • 2,145 views
0 votes
1 answer

Can we find out the bitcoin sender by their address?

It is not possible to find the ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,180 points • 2,580 views
0 votes
1 answer

What is the mean Hash Encryption?

Hash encryption is a form of providing ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,180 points • 1,301 views
0 votes
1 answer

Truffle npm run dev throws Error: npm ERR! Linux 4.15.0-39-generic

The json file required to run dev is ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,180 points • 2,888 views
0 votes
1 answer

Unboxing truffle: Shows error: Stopping to prevent overwriting data.

As mentioned in the error: unboxing or ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,180 points • 1,492 views
0 votes
2 answers

Truffle compile: Cant find module error

You can install babel-register and try again. ...READ MORE

Feb 19, 2019 in Blockchain by Loki
 • 3,572 views
0 votes
1 answer

truffle npm run dev not working

Are you running this command from the ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,180 points • 2,007 views
0 votes
1 answer

Ethereum "truffle server" gives error: TypeError: fsevents is not a constructor

Looks like you have files missing.  Try creating project with: truffle ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,180 points • 1,213 views
0 votes
1 answer

Not able to migrate contract in Truffle: Error: No network specified. Cannot determine current network

Make these entries in truffle.js file: module.exports = { ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,180 points • 1,581 views
0 votes
1 answer

Cant initialization project in truffle

Try this: truffle unbox webpack READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,180 points • 890 views
0 votes
1 answer

Ethereum truffle server command not working

Try this command to create project: truffle init ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,180 points • 1,730 views
0 votes
3 answers

Truffle migrate Could not connect to your Ethereum client.

As mentioned in the previous answer, you ...READ MORE

Feb 19, 2019 in Blockchain by Dinesh
 • 12,429 views
0 votes
1 answer

Not able to install truffle using npm install -g truffle

You'd need root access to install truffle ...READ MORE

Jul 14, 2021 in Blockchain by Dero Idoghor
edited Mar 5 • 4,914 views
0 votes
1 answer

Not able to start testrpc for Ethereum truffle

Hey. It seems like you already have ...READ MORE

Nov 28, 2018 in Blockchain by Omkar
 • 69,180 points • 1,349 views
0 votes
1 answer

How to install chaincode in new Org in hyperledger fabric?

To do this, first enter you cli ...READ MORE

Nov 22, 2018 in Blockchain by Omkar
 • 69,180 points • 1,909 views
0 votes
1 answer

Hyperledger Vagrant make peer failed

Maybe you forgot to install docker. Try ...READ MORE

Nov 22, 2018 in Blockchain by digger
 • 26,740 points • 1,589 views
0 votes
1 answer

Can not make a peer in Hyperledger Fabric

You have not installed jdk on your system. ...READ MORE

Nov 22, 2018 in Blockchain by Omkar
 • 69,180 points • 920 views
0 votes
1 answer

What is my chaincode ID in Hyperledger Fabric?

Hey. You have used chaincode id but ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
 • 69,180 points • 2,122 views
0 votes
1 answer

Command "network" is not defined. in hyperledger composer

For composer network to work, you must ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
 • 69,180 points • 1,839 views
0 votes
4 answers

Hyperledger fabric: enrollAdmin.js Error: Cannot find module 'fabric-client'

Change your directory to fabric-samples/fabrcar. And run: npm ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
 • 69,180 points • 6,067 views
0 votes
1 answer

"[RuntimeException] The "-t" option does not exist" error in Hyperledger composer.

This command runs on composer-cli. Have you ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
 • 69,180 points • 1,856 views
0 votes
1 answer

How to connect channels of different systems in Hyperledger Fabric?

When you create a channel, you will ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
 • 69,180 points • 939 views
0 votes
1 answer

Hyperledger Fabric: How to get transaction history using key?

history, err := stub.GetHistoryForKey(key_value) for history.HasNext() { ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
 • 69,180 points • 3,912 views
0 votes
1 answer

Hyperledger Composer: How to write complex queries in Composer?

You can do this using the query ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
 • 69,180 points • 1,460 views
0 votes
2 answers

Hyperledger Fabric: Channel creation failed! FAILED to execute End-2-End Scenario

This error usually occurs if some old ...READ MORE

May 8, 2019 in Blockchain by John
 • 3,623 views
0 votes
2 answers

Hyperledger byfn: could not assemble transaction: ProposalResponsePayloads do not match

This is because you have not installed ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
 • 69,180 points • 3,974 views
0 votes
1 answer

Hyperledger Fabric: “Local Fabric binary version does not match this newer version of BYFN and is unsupported”.

You need to first delete the existing ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
 • 69,180 points • 7,438 views
0 votes
2 answers

Hyperledger Fabric: Error: could not assemble transaction, err proposal response was not successful.

Hey. It seems like you already have ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
 • 69,180 points • 9,437 views
0 votes
1 answer

Ethereum: Cloning cpp-ethereum from git.

Yes, you can only clone the additional ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
 • 69,180 points • 1,300 views
0 votes
1 answer

Accessing External Api in HyperLedger Fabric

Generally you are not supposed to call ...READ MORE

Nov 17, 2018 in Blockchain by Christine
 • 15,750 points • 2,004 views
0 votes
1 answer

Hyperledger — how to set up REST API for invoking Chaincode?

Hyperledger Fabric v1.0 and later does not ...READ MORE

Nov 17, 2018 in Blockchain by Christine
 • 15,750 points • 3,016 views
0 votes
1 answer

How can I send data to docker?

Whenever i invoke chaincode from the cli ...READ MORE

Nov 17, 2018 in Blockchain by Christine
 • 15,750 points • 818 views
0 votes
1 answer

Hyperledger Fabric: How to Parse arrays in req.body in node js express?

You can get the value from the ...READ MORE

Nov 16, 2018 in Blockchain by Kavya
 • 6,817 views
0 votes
1 answer

Hyperledger Fabric: How to Enable Full Logging in Balance Transfer?

This is how you can do it. ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
 • 69,180 points • 1,874 views
0 votes
1 answer

Hyperledger Fabric: Changing component item owner automatically with its parent

You can try something like this: /** * ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
 • 69,180 points • 1,270 views
0 votes
1 answer

Hyperledger composer: How to include relationship in custom query?

You are trying to use filter={"include":"resolve"} in Composer Query. ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
 • 69,180 points • 1,355 views
0 votes
1 answer

Hyperledger Fabric :failed to send proposal to peers: Unable to resolve host peer0.org1

This peer address does not exist on ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
 • 69,180 points • 2,633 views
0 votes
1 answer

Hyperledger Fabric: How to start/stop the fabric nodes?

This is another way to do it: docker ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
 • 69,180 points • 1,818 views
0 votes
1 answer

Hyperledger Fabric: make peer make: *** No rule to make target `peer'. Stop

The makefile is in /opt/gopath/src/github.com/hyperledger/fabric , not ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
 • 69,180 points • 1,536 views
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